Can the second dose be one of the non-mRNA vaccines? If so, and she’s never had an allergic reaction to any other vaccination, that doesn’t strike me as entirely unreasonable. Especially if the alternative is just that she can’t go to a restaurant or the gym (e.g., she won’t loose her job).
That makes her... an anti-vaxxer.
Not all places are keeping people for 15mins or whatever for observation afterwards, she's lucky they did. (And obviously also unlucky there was a reason for that to be lucky.)
Anaphylaxis is dangerous. The vaccination sites in the US require 1 hour waits if you've had a reaction to a previous different vaccine. They're prepared. You don't get to "opt out" because you think you know better than the professionals.
You get to opt-in or not for whatever reason (good or not) you want.
Most people have bad reasons. I (had both doses myself fwiw, not that it's any of your business) think this is a decent reason, and doesn't deserve to be painted with the same brush.
The problem the government is trying to avoid is doctors who will give out exemptions too broadly. There is a balance to be struck and BC took a harder line.
1. https://twitter.com/DrBirinderSingh/status/14383191651740180...